Malicious PDF — malware analysis report

Static analysis result for SHA-256 69aa9d2c649ceb72…

MALICIOUS

PDF

89.0 KB Created: 2021-07-04 21:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e7bf80882f6ba95f20cbf11ed5637a59 SHA-1: dd0beaa074e3a1cb92f1f45fe1c50113e4ad529f SHA-256: 69aa9d2c649ceb72c083be91799c0135ea658c6de14cce0b36377b2b54c098ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites, identified by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically classified as 'Pdf.Phishing.Trojan'. The document body is heavily obfuscated, preventing a clear understanding of its direct lure, but the presence of these links suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160816466d8438---belivafusixemanovazo.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd0248daf4---kemalegi.pdf
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/90b6485e00e9a7fd40054bf980c81df1/55938709346.pdf
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/ti6p52vglv4gpv92appnbofj57/32463563775.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c28095a2d0---70098086435.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adcc95950dd---22895009797.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/0me4baearjkopn1v3i384ugk9h/17259591678.pdf
    • http://111-orte.de/testarea/cwsCMSlight/media/files/69715501904.pdf
    • http://change4best.ru/upload/file/foruwedubebewopovidupak.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad54b09693---77884491761.pdf
    • https://alutat.com/data/file/bazusixinixiwozijoxuv.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098caca8d99c---49659781688.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608861b89b824---52987166888.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607952eb6b400---71672409402.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/8ee0e292cdd9421d93c2e3278837bd81/43431334206.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/eon3rnpe8ebiaj830rkliupdh2/vavevevusovulugu.pdf
    • http://agcslohian.com/userfiles/file/58836078756.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5d3d0a877---92463092221.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6950af2af---bajirabuguwamejonudim.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ae918c214---vukokig.pdf
    • http://agataklimowska.pl/userfiles/file/kosemutagegopazi.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160720c120b770---33592410588.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/0olumsn5bcnd5urj99fn9p2uk0/zazezuxovusamidazakafuze.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/jtg8o35ie3eo370glv4b1ckhmv/somopazumojav.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=st+barnabas+outpatient+center
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8c3.bin
b0012c0b2ee931e762843b6f998f52dcaeb6dd85642ccc4b0854804fffe7e300		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C3 10636 bytes
font_01_sfnt_off000110fd.bin
0f4baac097cefed118246fabeafa588e1fcfd0bc7f2e38c86e5774a9faf2a5c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110FD 17324 bytes
font_02_sfnt_off00013eb1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13EB1 16792 bytes

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